CompTIA A+ 220-1201 - 8th Set of Videos

Thermochromic paper

Paper with a chemical coating that reacts to heat by darkening.

Thermal Feed Assembly

The mechanical system that moves paper through a thermal printer.

Thermal Heating Element

A fixed bar spanning the print area's width that activates thermochromic paper.

Toner

Fine powder used in laser printers; not used in thermal or inkjet printers.

IPA (Isopropyl alcohol)

Electronics-safe cleaning solvent that evaporates quickly and leaves no residue.

Thermal Cleaning Card

A maintenance consumable saturated with IPA used to clean a printer's internal path.

Antistatic Vacuum

Specialized vacuum used in hardware maintenance to prevent static discharge damage.

Archival-grade paper

Paper designed to resist fading and degradation over decades; opposite of thermal paper.

Impact Printer

A printer category (like dot-matrix) where the mechanism physically strikes the page.

Heat Sink

Passive metal component (usually aluminum) used to absorb and disperse heat.

Tractor Feed

Paper-feed method using teeth to grip holes in paper for precise transport.

Micro-encapsulated ink

Ink sealed inside microscopic capsules that burst when struck by a print pin.

Green bar paper

A historical standard output medium for early computer printouts and programmer workflows.

Modular design

Hardware principle where self-contained components are swappable without affecting the whole system.

Release lever

Tool-free mechanism using spring tension to hold or release hardware components.

Pre-printed forms

Multi-part documents (like invoices) where dot-matrix printers fill in specific fields.

Paper path

The full route paper travels from the input tray to the output tray.

VM (Virtual Machine)

A virtualized instance of an operating system running on physical hardware.

Host vs. Guest

The Host is the physical machine; the Guest is the VM running on it.

Sandboxing

An isolated environment where code runs without affecting the outside system.

VM Snapshot

A stored record of a VM's state at a specific point in time.

Production environment

The live, real-world system that actual users interact with.

Hypervisor

Software that sits above hardware to supervise and manage multiple VMs.

Bare metal

Running software or a hypervisor directly on hardware with no host OS.

NAT (Network Address Translation)

Translating internal addresses to one external IP at a network boundary.

Bridge network

Connecting a VM to the physical network so it appears as a real device.

Docker

The dominant platform for creating and running containerized applications.

DaaS

Desktop as a Service; a virtual desktop delivered over the cloud.

IaaS

Infrastructure as a Service; renting the kitchen (raw compute/storage).

PaaS

Platform as a Service; renting a kitchen with pre-made dough (tools/OS).

SaaS

Software as a Service; ordering the pizza (complete application delivery).

Elastic scaling

The ability of cloud systems to automatically expand or shrink based on demand.

Spin up / Spin down

Jargon for launching or shutting down a virtual instance.

Responsibility matrix

Document defining which security tasks belong to the cloud provider vs. the customer.

Community cloud

Cloud infrastructure shared by a specific group with common concerns (e.g., hospitals).